And make sure that when hooked up, your tongue is level, to a little nose down. Even if you have perfect tongue weight, improper angle will cause sway..

Have you checked your actual tongue to trailer weight ratio? That should be at least 10-12%.  If you're getting sway that ratio being too low is the most common problem. If you have too much weight aft you can get sway even with a heavier tow vehicle. A properly balanced trailer should not tend to sway even without an antisway setup. The antisway system just gives you an additional safety factor.  

Hi Chris - I’ll post a reply here publicly in case anyone else is looking at this vehicle as a TV. We’ve taken it on a number a trips throughout Colorado and up into Utah and it does just fine. Not sure I’d use it with a bigger, heavier trailer even though its rated for more weight than we are pulling. Power is adequate but not the same  as people pulling an RPod with a big pickup.

It’s an extremely comfortable vehicle and makes traveling very comfortable. We’ve ended up using it a lot even when not camping. We do use a weight distribution hitch w/ sway bars (Equalizer) and highly recommend it with this vehicle. Makes for a very smooth and safe-feeling tow. Very stable at highway cruising speeds. 

Short answer - I’d buy this vehicle again in a heartbeat. Not sure where you live, we are fortunate to have a very high quality independent mechanic in our town (Grand Junction) who specializes in Toyota 4WD vehicles . If we had to rely on a Lexus dealer I’m sure that it would be much more costly to maintain.

Feel free to pm me if you have any questions.

After lots of searching we narrowed it down to the Lexus GX470. Extremely capable tow vehicle with Toyota's legendary 4.7 L V8, and very comfortable to drive. We found a 2003 locally with fairly high miles (170K) that was in showroom-mint condition with full service records. Just got back from our first trip and it was a great choice for a tow vehicle, mileage not too bad considering that its a big V8 (about 14 mpg, 1/2 into a strong headwind and crosswind).

GX470s are not too hard to find on the used market, but like everything choose carefully. We don't plan on driving it much when not camping, so hoping for many years of happy towing. Here's a photo, to ensure compliance with the "no photo or it didnt happen" rule: